Transcript slides - Courses

Computer-Mediated
Communication
Information Pools
Coye Cheshire & Andrew Fiore
// April 8, 2017
Mark your calendars…
Dr. Marc Smith
Microsoft Research
Thurs Nov 1st — Guest Lecturer
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Class business
Annotations …
1) Do them.
2) If you haven’t done them,
do them.
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Forms of Interaction in Social Dilemmas
N-person PD
2-person repeated PD
Public Good
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Strategizing in repeated PD games

Consider two individuals
who interact repeatedly
over time
1) No mechanisms for
enforceable commitments.
2) No way to be sure what the
other will do on each ‘turn’.
What strategy might
you use if you had to
play this game over and
over again with others?
Always Cooperate?
Always Defect?
3) No way to eliminate the other
player or leave the interaction.
4) No way to change the other
player’s payoffs.
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Something more
complicated, perhaps
using past behavior?
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CCCCCCCCC…
versus
DDDDDDDDD…
Coop.
Coop.
A
Defect
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B
Defect
3 (R)
5 (T)
0 (S)
3 (R)
0 (S)
1 (P)
5 (T)
1 (P)
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When are Social Dilemmas Useful
in the Study of CMC?
Wherever we find mixed-motive situations and
collective action…
Standards Wars
Online Tagging Systems
(folksonomies), Collaborative
Editing Systems
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Del.ic.ious
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Producing ‘Impossible Goods’
 Peer-to-peer file
swapping
 Open-source
software
 Collective editing
information
systems
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 “Nearly anonymous people
from around the world with no
prior introduction
independently request or
contribute time and expertise
and freely give the result away
to anyone interested without
payment or coercion”
Your info
Their info
My info
 Marc Smith (1999),
referring to the Usenet
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“Information Pool”
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Group Size and Collective Goods
The group size effect should be reversed if the
value of the good does not decrease as
individuals consume it (Marwell and Oliver
1993)
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Information as a Public Good
1) Information can be consumed by many
without losing value (Jointness of Supply or
Non-Rival Goods)
2) When information is transferred or
exchanged, this can often be done in
replication.
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Replication
 ‘Replication’ is not synonymous with jointness
of supply or rival/non-rival goods.
Vs.
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http://www.download.com/
book_of_knowledge.pdf
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Digital Goods
 “digital goods” significantly
change the economics of
exchange
– including situations in
which they are produced
as a public good.
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Information Pools as “Group-Generalized
Exchange”
Information Pool
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Productive Exchange
+
=
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Information Pools as “Productive Exchange”
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Producing ‘Impossible Goods’: Thinking
About Classifying Information Pools
Order
 The process of production
and exchange is welldefined and the outcome
product is clearly specified
Coordination
 The roles of the various
actors are clearly specified.
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